WO2016058221A1

WO2016058221A1 - Smart full frequency domain 2.4g unidirectional frequency hopping communication method and system

Info

Publication number: WO2016058221A1
Application number: PCT/CN2014/089818
Authority: WO
Inventors: 韩性峰
Original assignee: 韩性峰
Priority date: 2014-10-29
Filing date: 2014-10-29
Publication date: 2016-04-21
Also published as: CN106664740B; CN106664740A

Abstract

Provided are a smart full frequency domain 2.4G unidirectional frequency hopping communication method and system. The method comprises: during code matching, a transmitter is near to a receiver, bidirectional communication is performed to implement code matching, and after code matching is successful, the transmitter and the receiver both possess an independent identification code and an independent original communication frequency, and synchronisation is established; in subsequent data transmission, unidirectional communication is adopted, and data need not be returned for confirmation, in order to increase the communication distance; each time data is transmitted, a data frame comprises the following information: a synchronous clock + reservation channels 1-N + data 1-M; the reservation channels 1-N are randomly generated by an MCU in the transmitter, and channel values within 1-N are different from one another. The system implements non-directional frequency hopping, increasing adaptability, and full frequency domain frequency hopping, reserving more devices spaces, and efficiently utilising frequency resources; during data transmission, unidirectional communication is used, and the receiver need not return data; the present invention is suitable for long-distance remote control.

Description

Intelligent full frequency domain 2.4G one-way frequency hopping communication method and system

Technical field

The invention relates to a frequency hopping communication system, in particular to a unidirectional frequency hopping communication system.

Background technique

The application of wireless communication in the current life is more and more wide, especially in the 2.4G frequency domain, remote control toys, home appliance remote control, wifi, Bluetooth and other communications, the frequencies used are all in the 2.4G frequency band. The more applications, the more obvious the problem of co-channel interference, and the effective use of limited frequency resources without interference is a difficult problem to be solved.

Bluetooth technology is a protocol that operates in the 2.4 GHz band and uses techniques such as high-speed frequency hopping and time-division multiple access to avoid co-channel interference. Although chips using Bluetooth technology have become popular in many devices, they are still difficult to satisfy in terms of cost and power consumption. The main disadvantages are as follows: huge protocol overhead - each Bluetooth device contains multiple protocol layers. Even a simple Bluetooth mouse contains at least four protocol layers; power consumption requires a larger microprocessor due to Bluetooth technology and continuous network traffic, so Bluetooth devices often have a battery life of only three months or less.

Summary of the invention

In order to solve the problems in the prior art, the present invention provides an intelligent full-frequency domain 2.4G one-way frequency hopping communication method and system, which can overcome the problem of co-channel interference, utilize frequency resources efficiently, and can be suitable for remote control.

The invention is achieved by the following technical solutions:

In one aspect, the present invention provides an intelligent full frequency domain 2.4G one-way frequency hopping communication method, the method being applied to an intelligent full frequency domain 2.4G one-way frequency hopping communication system, the communication system including a transmitter and a receiver The transmitter includes a radio frequency transmitter and an MCU, and the receiver includes a radio frequency receiver and an MCU. The method includes: performing bidirectional communication on a code to implement a pair of codes, and after the code is successful, both the transmitter and the receiver have An independent identification code and an independent original communication channel, the identification code can be generated by the MCU in the transmitter, and then establish synchronization; in the subsequent data transmission, one-way communication is adopted, and the data does not need to be returned and confirmed. To increase the communication distance; each time the data is transmitted, the data frame includes the following information: synchronous clock + reserved channel 1 + reserved channel 2+ reserved channel 3 + ... + reserved channel N+ data 1+data2+data3+...+data M; reserved channels 1-N are randomly generated by the MCU in the transmitter, and the channel values in 1-N are different from each other, after which the transmitter The "synchronous clock" in the automatic switch automatically switches to the next reserved channel after reaching a certain time; immediately after receiving the data, the receiver updates the local clock according to the "synchronous clock" information in the data frame, because the environment does not interfere with the receiver. When the data is received in time, the receiver will automatically jump to the next reserved channel according to the local "synchronous clock"; thus, the synchronization of the frequency hopping can be ensured even if the intermediate data is not continuous.

In extreme cases, the receiver does not receive data for a long time until the reserved channel has completely skipped, then the receiver enters the "original communication channel" and waits for the data of the transmitter; the transmitter will automatically return after a certain time. Go to the "original communication channel" once to ensure timely recovery of communication.

In another aspect, the present invention provides an intelligent full frequency domain 2.4G one-way frequency hopping communication system, the communication system including a transmitter and a receiver, the transmitter including a radio frequency transmitter and an MCU, the receiver including A radio frequency receiver and an MCU; the system performs the intelligent full frequency domain 2.4G one-way frequency hopping communication method of the present invention.

The invention has the beneficial effects that the intelligent full-frequency domain 2.4G one-way frequency hopping communication system provided by the invention realizes undirected frequency hopping, increases adaptability, full frequency domain frequency hopping, reserves more equipment space, and utilizes frequency efficiently. Resources; one-way communication is used for data transmission, and the receiver does not need to return data, which is suitable for remote control.

DRAWINGS

1 is a flow chart of a one-way frequency hopping communication method of the present invention;

2 is a schematic diagram of a data frame format of a one-way frequency hopping communication system of the present invention;

3 is a schematic diagram of a reserved channel with frequency hopping variation of the one-way frequency hopping communication method of the present invention.

detailed description

The invention will now be further described with reference to the drawings and specific embodiments.

The intelligent full frequency domain 2.4G one-way frequency hopping communication system of the present invention comprises a transmitter and a receiver, the transmitter comprising a radio frequency transmitter and an MCU, the receiver comprising a radio frequency receiver and an MCU. The communication system performs the intelligent full frequency domain 2.4G one-way frequency hopping of the present invention Communication method.

As shown in FIG. 1 , the intelligent full-frequency domain 2.4G one-way frequency hopping communication method of the present invention comprises: when the code is paired, the transmitter and the receiver are brought close to each other, and the two-way communication is implemented to realize the pair code, and the code is successful after the transmitter Both the receiver and the receiver have a separate identification code and an independent original communication channel, which can be generated by the MCU in the transmitter, and then establish a synchronization; in the subsequent data transmission, one-way communication is adopted, and the data is not Need to return the confirmation to increase the communication distance; each time the data is sent, the data frame includes the following information, as shown in Figure 2: synchronous clock + reserved channel 1 + reserved channel 2+ reserved channel 3 +.. ....+reserved channel N+data1+data2+data3+...+data M, reserved channel 1-N is randomly generated by the MCU in the transmitter, and the channel in 1-N Values are different from each other. The reserved channel is sent to the receiver in the form of data in the data frame, and the receiver saves the "reserved channel" after receiving it; after that, the "synchronized clock" in the transmitter automatically switches to the next reserved channel after reaching a certain time; Immediately after the receiver receives the data, it updates the local clock based on the "synchronous clock" information in the data frame. Because of the environmental interference, if the receiver does not receive the data in time, the receiver will automatically jump to the next reserved channel according to the local "synchronous clock"; thus, the synchronization of the frequency hopping can be ensured even if the intermediate data is not continuous; In extreme cases, the receiver does not receive data for a long time until the reserved channel has completely skipped, then the receiver enters the "original communication channel" and waits for the data of the transmitter; the transmitter will automatically return after a certain time. Go to the "original communication channel" once to ensure timely recovery of communication. The original channel is determined by the transmitter, and the original channels of different transmitters are not the same, so that the channels do not interfere with each other, and the stability of the communication is ensured.

The "synchronous clock" in the transmitter will jump to the next reserved channel after reaching a certain time:

After a certain time, the transmitting and receiving equipment will hop to the next reserved channel frequency and generate a new reserved channel. The new reserved channel is generated by the transmitting device during frequency hopping, and the channel value is set. Notify the receiving device to save in the data frame.

The existing working channel and the N reserved channels are different from each other to ensure the full frequency domain of the frequency hopping, ensuring that each channel has an opportunity to be used, and when one channel is interfered, the channel is not reused in a short period of time, for example :

The current working channel is: 66, the frequency hopping time is 30ms; the reserved 6 channels are: 2 (reserved channel 1), 99 (reserved channel 2), 128 (reserved channel 3), 33 (pre- Leave channel 4), 1 (reserved channel 5), 100 (reserved channel 6), and the data frame format is as shown in Figure 3(a).

After the channel 66 operates for 30 ms, the transmission and reception simultaneously hop to the channel 2 (reserved channel 1), and a new reserved signal value 27 is generated, which is different from the existing channel and the existing reserved channel, and the rest is different. The N-1 reserved channels are forwarded in sequence, and the data frame format is as shown in FIG. 3(b).

After channel 2 is operated for 30 ms, both transmission and reception are simultaneously hopped to channel 99 (reserved channel 1), and a new reserved signal value 88 is generated, which is different from the existing channel and the existing reserved channel, and the rest is different. The N-1 reserved channels are sequentially moved forward, and the data frame format is as shown in FIG. 3(c).

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims

An intelligent full frequency domain 2.4G one-way frequency hopping communication method, the method being applied to an intelligent full frequency domain 2.4G one-way frequency hopping communication system, the communication system comprising a transmitter and a receiver, the transmitter comprising a radio frequency a transmitter and an MCU, the receiver includes a radio frequency receiver and an MCU; and the method includes: performing bidirectional communication on the code to implement a pair of codes, and after the code succeeds, the transmitter and the receiver have an independent The identification code and the independent original communication channel are then synchronized; in the subsequent data transmission, one-way communication is adopted, and the data does not need to be acknowledged back to increase the communication distance; each time the data is transmitted, the data frame includes the following information: Synchronous clock + reserved channel 1 + reserved channel 2+ ... + reserved channel N + data 1 + data 2+ ... + data M; reserved channel 1-N by transmitter The MCUs are randomly generated, and the channel values in 1-N are different from each other, after which the "synchronous clock" in the transmitter automatically switches to the next reserved channel after reaching the first predetermined time; after receiving the data, the receiver immediately according to The "synchronized clock" information in the data frame is more The new local clock; if the receiver does not receive the data in time, the receiver will automatically jump to the next reserved channel according to the local "synchronous clock".
The communication method according to claim 1, wherein said identification code is generated by MCU rolling code burning in a transmitter.
The communication method according to claim 1, wherein if there is interference in the current channel in the working environment, the communication is not smooth when the frequency hopping to the channel, or the communication cannot be established at all, causing the receiver to receive no data, and the receiver It will also automatically hop to the next reserved channel after the time has elapsed according to the original "synchronous clock".
The communication method according to claim 1, wherein when hopping to the next reserved channel frequency, a new reserved channel is generated at the same time, and the channel is different from the currently used channel and the existing reserved channel; The remaining N-1 reserved channels are sequentially advanced, and the new reserved channel is after the remaining N-1 reserved channels.
The communication method according to claim 3, characterized in that the new reserved channel is generated by the transmitting device at the time of frequency hopping, and the channel value is placed in the data frame to notify the receiving device to save.
The communication method according to claim 1, wherein in an extreme case, the receiver does not receive data for a long time until the reserved channel is completely skipped, and the receiver enters the original Start communication channel", waiting for the data of the transmitter; the transmitter will automatically return to the "original communication channel" once after the second predetermined time to ensure timely recovery of communication.
An intelligent full frequency domain 2.4G one-way frequency hopping communication system, the communication system comprising a transmitter and a receiver, the transmitter comprising a radio frequency transmitter and an MCU, the receiver comprising a radio frequency receiver and an MCU; The system performs the intelligent full frequency domain 2.4G one-way frequency hopping communication method according to any one of claims 1-6.